let helloExports = require('./hello');//获取的是hello.js中的exports对象。
let hello2 = require('./hello2');


hello2.word();
hello2.ligang();

setTimeout(function () {
    helloExports.word();
    console.log('http://www.runoob.com/nodejs/nodejs-module-system.html');
}, 1500)

setTimeout(() => {
    console.log(module);
}, 2000)